Heater and ventilator



J. A. GREENE. HEATER AND VENTILATOR. APPLICATION FILED 06128. 1920.

9w 2 W n M a 1 M a s H 3 A.

w w J n b w 8 1| M 5 4 \wm w lu w E a M D 1'. A. GREENE.

HEATER AND VENTILATOR.

APPUCATION FILED OCT. 8, I920.

Patentd May 16, 1922.

5 SHEETS-SHEET 2.

uB/an A arm J. A. GREENE.

' HEATER AND VENTILATOR.

APPHCATION FILED OCT. 8, I920.

Patented May 16, 1922.

5 SHEETS-SHEET 3.

J. A. GREENE. HEATER AND VENTILATOR. APPLICATION FILED OCT. 8, 1920- n m E e R 6 V m A ME M w a h e w t V m P J. A. GREENE.

HEATER AND VENTILATOR.

APPLICATION FILED OCT. 8, 1920.

Patented May 16, 1922.

5 SHEETS-SHEET 5.

T fill JOHN A. GREENE, 01* LONG- BEACI-ll, CALIFORNIA.

HEATER. AND VENTILATOR.

Specification of Letters Patent.

Patented May 16, 1922.

Application filed October 8, 1920. Serial No. 415,660.

To all whom it may'concern Be it known that 1, JOHN A. GREENE, a citizen of the United States, residing at Long Beach, in the county of Los Angeles and State ofCalifornia, have invented certain new and useful Improvements in Heaters and Ventilators, of which the following is a'specification.

This invention relates to heaters and ventilators and has special reference to portable heaters which may be located at any desired point of a room or in an open fireplace and by the use of which a supply of fresh air may be drawn into the room which is to be heated and foul air drawn from the room and discharged outside the building.

In the drawings Figure 1 is a perspective view of one embodiment of my present invention Fig. 2 is a vertical longitudinal section of the same;

Fig. 3 is a fragmentary section showing a slight modification;

Fig. a is a horizontal section on the line l of Fig. 2;

Fig. 5 is a vertical longitudinal section showing another modification of the invention;

Fig. 6 is a sectional perspective view showing a further embodiment of the invention;

Fig. 7 is a vertical section showing another form of the invention;

Fig. 8 is a sectional perspective view showig an e aboration of the invention;

Fig. 9 is a vertical section showing still another form of the invention;

Fig. 10 is a perspective view showing another form.

In the embodiment of the invention illustrated in Fig. 1, I employ a casing 1 which may be constructed of sheet metal and is supported upon legs 2 and provided in one end with an opening Spaced from the bottom of this casing and extending from the front end wall thereof to a point near the rear wall is a horizontal partition or shelf i at the rear end of which is a short vertical wall or plate 5. From the upper edge of the wall or plate 5 to a point near the front end wall 6 of the casing a partition 7 extends upwardly and forwardly and from the front edge of this partition a vertical inner wall 8 extends to the top of the casing. A burner 9 for gaseous fuel is supported upon the back wall or plate 5 and fuel is supplied to said burner through a pipe 10 equipped with a 'ing to the outer air.

cut-off valve 11 which may be of any preferred construction as will be readily under stood. Extending through the casing from the inner vertical wall 8 to and through the back wall 12 is a flue 13 or a plurality of said flues, a transverse header 1% connecting the rear ends of the fines and having a common outlet nozzle 15 which may extend into the chimney or through the wall of the build- A fresh air supply pipe 16 passes throgh the back wall 12 of the casing and is disposed between the bottom of the casing and the shelf 4-, the said fresh air inlet pipe being spaced from the bottom of the casing and from the said shelf and terminating short'of the front wall of the casing.

It will be readily noted from the foregoing description that the space in front of the burner and the members 5, 7 and 8 constitutes a combustion chamber which is open to the room in which the heater may be placed, while the space between the back wall 12 of the casing and the members 5, 7 and 8 constitutes a ventilating or fresh air chamber, the temperature of which will be raised by radiation from the partition 7 and the wall 8 and also by radiation from the tube or tubes 13. To permit the heated air to pass into the room in any desired quantity, I provide in or near the top of the casing 1 a damper consisting of a rotatable plate 17 having openings 18 therethrough which openings are adapted to register with similar openings 19 in the top of the casing. The damper is provided with a suitable handle 20, as shown and as will be readily understood. The members 7 and 8 will preferably be constructed of sheet metal so that they will quickly become raised in temperature by the action of the flame from the burner 9 and by the heated currents passing from the flame and it will be readily under stood that a suction is reated, through the fines 1, the manifold 14 and the outlet 15 to draw the fumes from the burner up be tween the walls 6 and S into and through the said tubes, manifold and outlet and the circulation thus created will draw through the opening 3 the greater portion of the foul air which may have accumulated in the room. It'will thus be seen that a constant supply of heated fresh air will be given off to breathe vitiated air. It will also be noted that the shelf 4 is exposed to the heat from the burner 9 and the fresh air discharged from the inlet pipe 16 will come into contact with this heated shelf immediately upon its exit from the said pipe and will, therefore, be raised in temperature before it begins to rise through the chamber in rear of the partition 7 and inner wall 8.

In Fig. 3, I have shown a slightly different arrangement in which. the fresh air inlet tube 21 has a vertical branch supported upon the back wall of the casing and has its inlet terminal 22 extended tlnough the said back wall near the top of the same and then car ried througl'i the wall of the building or otherwise placed in communication with the outside air. The action of this form of the apparatus is the same in all respects as that previously described, but the inflowing air will be more quickly heated inasmuch as the vertical branch 21 will be exposed to the heated currents rising from the wall 5 and the back end of the partition 7 so that before the air is discharged from the fresh air inlet pipe it will be somewhat raised in temperature.

In Fig. 5, l have shown a form of the invention in which the fresh air pipe 23 is brought through the base of the chimney 2% directly into the lower portion of the fresh air chamber of the heater and the burner 25 is mounted upon a shell or inner wall 26 which is located close to the front wall 27 of the casing and adjacent an opening 28 therem. The shell or inner vall 26 is given an ogee formation with its upper and lower edges secured firmly and directly to the front wall 27 above and below the opening 28 therein, while the ends of the shell are secured directly to the end walls of the casing in any convenient manner which will prevent leakage of air tarough the joint. Extending from the upper portion of the shell 26 and communicating with the space between the shell and the front wall 27 is a coil 29, or a plurality of such coils, which, as clearly shown, pursues a tortuous course to a point near the top of the casing where it is carried throlilgh the back wall 28 thereof to discharge into the chimney 24'. lVhcn a plurality of coils are employech they will terminate in a manifold from which a single outlet will lead into the chimney A. damper 30, of the same construction as th damper shown in Figs. 1 and 2 and pre viously described. is provided to control the flow of heated air into the room. This form of the invention will he sometimes preferred because the burner is located closer to the front wall of the casing and the heat thrown off directly by the burner will more quickly pass into the room. Vlhilc the shell 26 provides a smaller heating surface than the partition? and inner wall 8 of the previously described embodiment-of the invention the tortuous coil 29 provides a heating surface greatly in excess of that provided by the tube or tubes 13. It will, of course, be understood that straight conduits, such as the tubes' 13, or any other practical form of conveyer for the heat currents may be used, instead of the coil 29, in connection with the shell 26. a

In the form of the invention shown in .lfig. 6, the burner 81 is located within or upon a shell 32 in substantially the same manner as the burner and shell shown'in Fig. 5 and last described. The fresh air inlet tube 33 enters the outer casing through the bottom of the same and instead of the coil 29 I employ a plurality of box-like heating compartments 34- which are disposed in spaced relation one above another and are connected alternately at their opposite ends by short vertical tubes or nipples 35 so that the heated currents rising to the top of the shell 32 will be drawn into the said compartments and caused to circulate overa tortuous path through the upper portion of the casing to raise the temperature of the fresh air admitted at the bottom of the casing and rising between the walls of the casing and the ends and sides of the sail box like compartments. From the top compartment 34;, a discharge nozzle 36 rises through the casing and maybe carried to the outside air in any preferred manner. A. damper 37 similar in all respects to the previously described damper is provided upon the top of the casing to control the escape of heated fresh air into the room.

In Fig. 7, I have shown an embodiment of the invention in which the casing 38 is more elongated than in the previously described forms and a shell 39 is supported within the lower portion of the casing at the center of the same and a plurality of burners 40 is disposed within the shell. At the center of the shell, in the top of the same, is a nozzle 4.1. from which a tube or pipe 42 extends laterally to one side or end of the using where it leads into a header or coupling 43 from which a nipple 4 lrises to connect said coupling with a similar coupling 41:5. The couplings are supported upon a shelf 4.6 on the side or end wall of the casing and a tube 47 leading from the coupling 4-5 extends entirely across the cas ing to the opposite side of the same where it discharges into a coupling 48 resting upon a shelf 49 on the wall of the casing. The coupling a8 is connected by a nipple 50 with a coupling 51 from which a pipe 52 extends back across the casing and this back and forth arrangen'ient of the tubes or pipes is carried to the center of the casing near the top of the same where a small box or coupling 53. is provided to connect the uppc most pipe 52 with a discharge pipe which may be carried into the chimney or through the wall of the building or other wise placedin communication with the outside air. In this form of the invention, a fresh air inlet pipe risesthrough the bottom 56 of the casing and enters a nozzle 57 having an open'upper end and having pipes 58 leading laterally therefrom, the said pipes 58 terminating acent but short of the end walls of the casing. It'will be noted that the supply of fresh air in this arrangement is distributed within the heater casing so that it will'be more effectual y diffused and permitted to come into contact with the entire surface ofthe radiating coil. consisting of the pipe l? and the several pip-es 52. Some of the incoming air, furthermore, will be discharged directly against the bottom of the shell 39 which will deflect and spread the same toward the ends there of and will thereby aid in attaining a more complete heating of the fresh air. In this form of the invention, a plurality of dam pers 59 is employed but said dampers are of the same construction and operation the dampers previously described.

In the form of the invention shown in Fig. 8, the outside casing is of the same formation as the casing illustrated in Figs. 1 and 2, but the portion thereof above the opening in the front wall of the same is of greater vertical extent than the first described casing. By reference to said Fig. 8, furthermore, it will be noted that the shelf 60 is inclined downwardly and forwardly and has its front edge secured upon the bot tom 61 of the casing. The fresh air discharged into the space between the shelf 60 and the bottom 61 will thus be brought into more intimate contact with the shelf and will be more abruptly turned back to flow to the rear of the casing, The burner 62 is supported at the rear ofthe shelf 60 upon a short vertical wall 63 spaced from the rear wall 64; of the casing and a partition 65 rises from the upper edge of the short vertical wall 63 to a point near but spaced from the upper front wall 66 of the casing where it is secured to the lower rear edge of a hood consisting of a short vertical wall 67 and a horizontal wall 68 extending from theupper edge of the said vertical wall to the front wall 66 of the casing. The said horizontal wall 68 is secured to thewall 66 in any preferred manner and a series of outlet openings 69 is provided in the wall 67, a header 70 being supported on a shelf or bracket 71 on the rear wall 64: of the casing, as shown. Shelves or plates 72 and 73 extend from the wall 67, the rear edges of the said shelves being connected by a plate 74- which is spaced from the header 70 and communicates therewith through a series of nipples or outlet openings 75. These shelves or plates 72 and 73, besides forming the top and bottom of a heat conduit, constitute braces to reinforce the short vertical wall 67 and also serve as battles to arrest the upfiowing currents of fresh air so that the volume of said air will be held for an appreciable period over the partition 65 where it will be exposed to the heat radiated from said partition. It will be understood, of

course, that the'plates 72'and73 terminate short of the end w lls of the casing and are connected by vertically disposed plates so that the space between the plates is closed to the fresh air intended for delivery into the room. From the header 70, tubes 76 (only one tube being illustrated in order to avoid confusion in'the drawing) extend forwardly to establish communication between the said header and a similar header 77 supported on the front wall of the casin This header is in turn connected by a tube or tubes 78 with a rear header 79 and from the lastmentioned header a coil or series of coils 81 extends to establish communication with front header 82. Above the coil 81, pipes 83'and headers S lcontinue the tortuous circulation of the fumes and heat from the burner within the upper portion of the casing. The uppermost headers 84 at the rear of'the casing are provided with nipples 85, any one of which may be extended through a board'or plate 86 fitted within a window below the sash so as to carry off the obnoxious vapor to the outside air. In the illustration, the nipple extending from the third header from the top is carried through the window plate 86 while caps 87 are secured upon the nipples above the same and there will, therefore, be no circulation through the uppermost tubes and the headers connecting the same, although said headers and tubes will, of course, be filled with the hot air which does not pass off to the outside airf The fresh air inlet pipe 88 is disposed vertically at the back of the casing and has its upper end 89 projected through the window plate 86, while its lower portion 90 extends intothe casing. A dam-' per 91'is provided in the upper portion of the casing to control the flow of heated air into the room. It will be readily understood that this heater may be placed adjacent any window and the fuel carried to the burner 62through a hose or other flexible pipe.

In Figs. 9 and 10, I'have shown forms of the apparatus which are similar to the form shown in Fig. 7 in having a burner-enclosing shell disposed at the center of the casing near and spaced from the bottom thereof. In Fig. 9, the shell .92 is provided with a top of a somewhat conical form, being higher at its center 93 than at its edges and burners 94: are located at the junctions of the top with the side walls of the shell. The fresh air is admitted to the casing below the shell through branch pipes and a pair of headers 90 is disposed upon the top of the shell and communicates with the interior of the same. From each of these headers a lateral pipe or tube 97 extends to the side of the casing where it is secured to and enters a header 98 supported upon a shell or bracket 99 on the side wall of the casing. As clearly shown in the drawing a series of headers and pipes is provided so that the heat arising from the burners will be directed into the headers 96 and thence circulate toward the ends of the casing, then back to the center of the same, and so tortuously flow back and forth from the center to the ends, finally escapingthrough an outlet 100 which may be carried through a window plate or through the wall of the building. In Fig. 10, the fresh air is admitted through a pipe 101 extending directly through the bottom of the casing and the shell 102 is constructed. with a drum or box 103 extending rearwardly from its upper forward corner. Circulating coils 104 and 105 extend from opposite sides of this drum 103 and carry the hot air from tortuous paths to the outlet 100. ()f course, other forms of conduits may be used.

From the foregoing description, taken in connection with the accompanying drawings, it will be seen that I have provided a simple and inexpensive apparatus whereby heat from. a burner or other combustion ele ment will be permitted to rise through the apparatus and escape to the outer air without passing into the room and in such a manner that the foul air in the room will be drawn into the apparatus and passed off with the hot currents. At the same time fresh air will be delivered into the device and circulated through the same so as to be raised in temperature through contact with the hot surfaces of the elements defining the course of the heat from. the burner but prevented from commingling with said hot air currents. In all forms of the device, the flame will play directly upon a heat-dispensing element which will act directly on the fresh air delivered into the apparatus. In all forms of the apparatus, moreover, the hot currents will be caused to follow a prolonged sinuous path so that the heat given off thereby will be utilized to the fullest extent," and it is to be understood that the drawings are illustrative only and not re strictive. Any form of heat conduit shown may be used. in any form of the invention and the various forms of conduits may be used alone or together as desired.

Having thus described the invention, what is claimed as new is:

1. A heater comprising a casing having an opening in its front wall, a combustion chamber supported within the casing by the front wall thereof, the top, bottom and back of the combustion chamber being spaced? from the walls of the casing, the top and bottom of the combustion chamber being; respectively above and below the opening in the front wall of the casing and the interior of the casing constituting a heating chamber surrounding and closed to the combustion chamber, a burner supported within the combustion chamber at the back of the same,

a fresh air 3i 3e dischar in into the s ace below the combustion chamber, and a heating with its top, bottom. and back spaced.

from the top, bottom and back of the casing, the front wall of the casing constituting the front wall of the combustion chamber with the upper end of the opening in said wall below the top of the combustion cham her and the lower end of said opening above the bottom of the combustion chamber, the interior of the casing constituting a heating chamber closed at all points to the combustion chamber and unobstructe-dl throughout from its bottom to a plane passing horizontally through the combustion chamber near the upper extremity of the same, the horizontal area of said heating chamber progressively increasing toward the top of the combustion chamber, a burner supported within the combustion chamber at the back of the same, means for delivering fresh air into the casing under the combusti on chamber, and exhaust conve'yers leading tortuously across the upper portion of the casing from. the upper extremity of the combustion chamber to the back of the casing at the top thereof.

In testimony whereof I aim; my signature.

JOHN A. GREENE. [L S.] 

